package br.com.cicero.futebol.filters;

import java.io.IOException;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;

@WebFilter(servletNames = {"Faces Servlet"})
public class JPAFilter implements Filter {
	
	private EntityManagerFactory factory;
	
	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
		
		this.factory = Persistence.createEntityManagerFactory("Futebol-PU");
		
	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		
		EntityManager em = this.factory.createEntityManager();
		request.setAttribute("EntityManager", em);
		em.getTransaction().begin();
		
		chain.doFilter(request, response);
		
		try {
			
			em.getTransaction().commit();
			
			
		} catch (Exception e) {
			
			em.getTransaction().rollback();
						
		} finally {
			
			em.close();
			
		}
			
	}
	
	@Override
	public void destroy() {
		
		this.factory.close();
		
	}

}
